109162721 has 2 divisors, whose sum is σ = 109162722. Its totient is φ = 109162720.

The previous prime is 109162709. The next prime is 109162727. The reversal of 109162721 is 127261901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88360000 + 20802721 = 9400^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 109162721 - 2¹⁸ = 108900577 is a prime.

It is a super-2 number, since 2×109162721² = 23832999312247682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109162727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54581360 + 54581361.

It is an arithmetic number, because the mean of its divisors is an integer number (54581361).

Almost surely, 2^109162721 is an apocalyptic number.

It is an amenable number.

109162721 is a deficient number, since it is larger than the sum of its proper divisors (1).

109162721 is an equidigital number, since it uses as much as digits as its factorization.

109162721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 109162721 is about 10448.0965252050. The cubic root of 109162721 is about 477.9232047516.

The spelling of 109162721 in words is "one hundred nine million, one hundred sixty-two thousand, seven hundred twenty-one".